257906

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{617}}^1$

素因数の和:649

約数の個数: 16

約数和(自身を含む): 444960

約数和(自身を除く): 187054

約数列:

[1, 2, 11, 19, 22, 38, 209, 418, 617, 1234, 6787, 11723, 13574, 23446, 128953, 257906]

約数ペア:

[(1, 257906), (2, 128953), (11, 23446), (19, 13574), (22, 11723), (38, 6787), (209, 1234), (418, 617)]